Eugene b



E. B. WHELAN STEAM CIRCULATING BY-PISS AND RELIEF VALVE. APPLICATIKON FILED FEB. 1. 1919.

1,351,314. PatentedAug. 31,1920.

. y 4 sHEETs-sHEE-l. i Z L 54 dl. 60.5,e 34

Z7 'l y' 57 I I Z0 Z6 26 Z`` *1" l 9 z2 /ye 1-Z (4:25* l l ih- 77 f7 40 I( (655 \l {5:} 4 f4-'76* l 7i /6 f J0 f4 46 LA 5 I I I I I I f I I i i I i f z g /f f5 E I g ll l I l l l 'l x I l I l a l 1 I i s E i f l: l, r f l z LLEJEQ- /lVl/ENO? acs/v5 WHELAM.

E. B.-`WHELANl STEAM CIRCULATING BY-PASS AND RELIEF VALVE. APPLICATION man FEB. l. 1919.

4 SHEETS'-SHEET 2.

A \`Aao oe oo 0 /7 A TTOH/VEVS Patented Aug. 31, 1920.

l E. B. WHELAN. STEAM CIHCULATING BVV-PASS AND RELIEF VALVE. APPLICATION FILED FEBII i919.

1,351,314. Patent 4 SIIEETSSHI-IET 3.

Z7 Z0 0 I i A mfr/ms ed Aug. 31, 1920.

E. B. WHELAN.

STEAM CIRCULATING BY-PASS AND RELIEF VALVE. APPLICATloNvFlLED FEB. 1, 1919.

1 3 5 1 3 1 4 l Patented Aug. 31, l1920.

4 SHEETS-SHEET 4.

y Wl T/VESSES A TTOHNEVS @State of Nebraska, have lfI- certain slightchanges readily made,

Ythrough portions. of.

'Y f Eireann B. wi-iniiaiv, or oiliariafnniaaasiraf STEAM-ein'oULATINe Applicationl-led February 1, 1919-.v Serial No2-74,5721.

'To all whom tmayconcern:V p Y Be it known that I, EUGENE B.WHELAN,

a citizen of the UnitedV States, and a resident v of Oma-ha, inthe county ,of Douglas land invented` certain new and useful Improvements in Steam- Circulating By-Pass and Relief Valves, of which the Vfollowing is a specification.Y

My present invention relates generally to .valves for steam engines, especially steamV locomotives, ofthe piston. valve type,

and particularlyto valves which function as bypass valves, my object beingV thev provision of an arrangement whereby low pressure steam is positively circulated'r through. the cylinders whenl a. locomotive. Visdriftingforpurposes of lubrication, in addition to the usual functions of. a valve; of. this type.

A. further. obj ectfof my 'invention is tovprovide an arrangement of. the above nature wherein by cutting; off the -feed ofsteamarlildt e valve 'may be. madetol operate as, the ordi-y nary' bypass anl vacuum, and compression relief valves. Y,

A stillgfurtherobjeot is the provision of a `steam l circulatingby-pass and relief valve in whichlthe provision` isgmade for a positive feed of steam, that is,V low pressure steam, to thehigh pressure steam space of the valve chamber in` addition to the forced circulation throughthe cylinders so that in l case of continuedV drifting,` all service `ref quirements. are met-by a measured feed of low pressure: steamthrough the ,action of thefpiston valve.. f n

Stillfurther `objects andthe resulting advantages. of Ymy present invention, will' be :made plain in thecourse of; the following description, reference beinghadito the accompanying drawings, forming a part of this specilicatiominwhich2e Figure 1 is a vertical longitudinal section through my improvements in connection therewith,

Fig. lis a vertical]transversesection tal'ren substantially on line fie-5 of Fig. 1,

Y Fig. 6 is. detail: perspective view.` ofthe pilot valve,

Specification of Letters Patent.

and. vacuum andV compression relief ,l

a piston valve and` and 4 arev horizontal sections taken respectively onlines 9,' 52-3-3 andv BY-rass AND RELIEF vALvE.' Y

v Patented Fig.. 7 is a detail ypersp.ective view Aof the plug of the pilot valve, l

Fig. 8 isV an elevation showing'fthe steam l* supply controlling means, and l Fig.-9 is a planl view of a portionfof Fig, 8, as hereinafter described.

casing generally indicated-at 1G,V in which a piston valve (not shown) moves in the por-` tions 11 and' 12' upon oppositersides of the main high. Ipressure lsteam space 13.'A l

.The piston valvecasing 1Q communicates with the steaml cylinders (not shown)v in the usual way, and: has upper passages 14: and A y 15 which inaocordance with my improve- ,l c R feiring.A now to these gureS, l have in l Fig. 1 in particular'shown a piston valve;

ments are out throughk the upper portion of its wall, or at another suitable point, as indi- Y cated at. 16, andcommunicates with lthe side channels 17'and 18-of aivalveblock 19v secured by bolts 2O or byother suitable means, to the upper portion of thecasing 10.A

This valve block 19- has 4vertical Valve :Y Vbores in spacedparallel relation to receiveV vertically movable valves 2 13and 22,- rand y haveA vertically spaced valve seats 23 with which' the vertically,

each of these bores spaced valve facesgQl of valve 22' coperatie. Between the valve' seats 23 ofeach bore an enlarged chamber 25' is formed which communicates with therespective channel 17, 18,

and above-the upper valve 'seat 23, each bore' has an enlarged-chamber 26, as well ask an enlarged chamber 27 belowthe lowervalve The lower enlargedchambers 27# -9o' seat 23. are in communication ythrough a channel 28 and the upper chambers 26 .are likewise in ber 31 located in the blocl; 19, having a side opening 32 and opposed. side channels 33 which respectively lead from therchamber 31 to the upper end shown, the upper extremities of bores are closed by plugs 34.k

which Vvalve of the two valve boresas communication through fa channel' 29 the.V l I lower ends ofA a central vertical vpassage 30, leading downwardly from an .upper chamf valve bore abovethe two valve seats 23, soV`V that, with the valves lowered away from Fig. 1, ,thel two side their seats, `as seen in.-v steam channels 17 and 1 8are in communica tion' through: channel 28 andthe upper connecting chanboth v thef lower connecting v Y Y I 10o Y Each of the valves 21v and 22has guides 'i Y' 35 which slide in portions of the respective:

nel 29. rlhis communication is under ordinary running conditions cut oil"v by virtue of the fact that the valves 21 and 22 are held against their seats, bythe pressure within the main steam space 13 through the vertical opening 36 leading' 4from the main steam space and upwardly to the lower end of the two valves. Y

Above the upper enlarged chambers 26 of each of the valve bores, each valve has a piston 37 and a second reduced piston 38 in the upper reduced portion of the bore, the

upper end of the valve being engaged by a spring 39 compressed between the upper end of the upper piston 38 and the plugs 34 closing the upper end of its bore. s

Each of the valves 21Y and 22 is furthermore provided with an axial channel 40 eX- tending therethrough from its upper end to ya lower valve chamber formed within the valve as seenvat 41, the upper portionY of which forms a seat for a vertically movable pilot rvalve'42,th(i latter seating upwardly and normally held in closed position by the pressure of the main steam space 13. ln its lower open position, the pilot valve 42, which has upwardly extending guides 43, is provided with a lower central boss 44 which rests upon the upperflat face of a plug 45 threaded into a diaphragm having an annu lar series of openings 46 around the valve 42 and through which the pressure from the main steam space 13 finds its way, to normally seat the pilot valve.

ln addition to its axial channel or bore 40, each-valve 21, 22, has a lower enlarged the channel 30 and upper steam` chambers 26V as well as connecting channels 29.

To provide for the steam action as just above described, a low pressure steam supply pipe 48 leads to` the valve block 19 and is connected to the opening 32 of the upper central steam chamber 31 and it is this low pressure, which, with the'valves 21, in their upper closed position, simply remaining inactive, at once becoming' active upon failure of pressure within the high pressure steam space13 when the locomotive throttle is closed and the locomotive is drifting, the

low pressure steam then entering viously described into the channels as pre- 17 and 18 through theopeh valve so as to; provide for a continuous supply of low rpressure steam to be circulated through the steam cylinders, carrying lubrication thereto, in addition to their usual function in connec? tion with the'` formation of a by-pass between the cylinder ends and the relief both of vacuum and compression in thecylinder. In the last describedaction Vof the valves 21 and 22 when open,various surfaces thereof i are of course subject to the action of the low pressure steam, notably among these being the lower surfaces of the lower enlarged pistons 37 as well as the vuppersurfaces of'-V the smaller upper pistons 38,the latter of which are also engaged by the springs 39, considering which, it k'is obvious slight adjustment the valves 21 and 22 may be perfectly balanced' opened to the open positionias shown in F ig. 1 'when' the high pressure steam fails, due to' the closing of the throttle, and* to drop readily and be that by move instantly to closed'position when the throttle 1s again opened," as well as for the mr Jose of defeatinor all danO'er of the valve n :D sticking.

It is furthermore obvious thatwhen the Y valves 21 and 22 lowerto their-open position, their pilot valves` 42 also drop to open position so that the low pressure steam from the upper chamber 31 iinds itsway through the channel 33 and the axial bore 40 of the two valves and thence downwardly through j Y the diaphragm openings 46 tothe lowerV counterbores of the val-ves, and consequently into the main steamv space 13 of the'piston valve through the openings 36 so that in case of continued drifting all service conditions are readily met byV the'measured supply of lsteamto the cylinders through the main piston valve. Y

i4s seen in FigsyS and 9, the low pressure steam supply pipes 48 lead froma pressure reducing valve 49, tothe latter of which steam is suppliedl through a pipe 50 controlled by a cutoff valve 51 which is nor- 1101 mallyclosed and has a projecting stem 52. 4

The controlling valve 51 also controls the supply of steam through a pipe 53 to the lubricator 54 connected byV a pipe 55 Ywith the pressure reducingy valve 49 and consequently the supply pipe 48 to the two cylinders. The controlling valve 5l is furthermore placed adjacent tothe main steam throttle 56 having, in accordance with my presentimprovement, a side tappet 57 for engagement with the stem 52 of the con-V trolling valve 51 to open this valve when the throttle 56 is pushed to closed position.,

This tappet is, however,'controlled by a latch 58 so that' if desired, theoperator in closing the throttle 56 may draw theta pet 57 outwardly along the throttle lever and thus out of contact-with the valve stem 52, the tappet resting, closed in this way, upon a cated at 59 in Fig. 9. Y

rlhus, in all ordinary stops when the throttle is closed, the tappet 57 engages the valve stem 52 andlow pressure steam tappet rest indiv is thus/supplied through the low pressure tion, it is also to be observed that if for lany Y becomes unnecessary,

scribed, comprising a` and upper and lower reason it is notdesired to supply low pressure vsteam'through pipe L18, or if for any reason it becomes impossible to do so, these pipes may simply be disconnected from the valve blocks 19 and openings 32' will thus act simply as ports to theatmosphere. In

this case, the upper vertical channel .8O between the uppercentral chamber 31 and the upper connecting channel 29 is plugged as unless steam is utilized, this vertical channel connection with steam being-to provide Yfor the drainage of condensation from the upper chamber 31. Also when the chamber 31 is ported to the atmosphere, the valve bores 40 are plugged and lthus when the valves 21y and 22 drop by gravity, assisted by the springs 39,.upon failure of .steam in the high pressure steam space 13 by closing of themain throttle, the steam already with-` in the'cylinders is simply by-passed through the valves and the yside channels 17 and 18 vuntil it is exhausted, without the addition of other steam as Vpreviously described, and vacuum and compression within the main cylinders is thus relieved. I

In order to guard againstl possible failure of operationof the reducing valve, a pop valve' 60 is preferably utilized in connec# tion with the chamber-'31 as seen in Fig. 1.

1. `A drifting device of thecharacter devalve block having spaced valve bores chambers communicating with ythe upper and lower portions of said valve bores and having an intake opening, said bloclr also having valve bores, double seating valves working in said bores for controllingv communication 'y between the said channels, and having pis-V tons at one endadjacent the upper bores engaging the ber, springs in the valves at one end, said block having passages between its saidv Vchambers andthe said channels also controlled by the valves and opening at one side of the said valve pistons, and said valves having lower holwhen the throttle its normal function iny low pressure steam to spaced apart in channels communicating with said` chamv lowrends slidably interfittin'g the lower por` tions of the boresvand providedwith aper` tures in the walls thereof communicating withthe Alower chamber. y

2. A drifting device of thel character described, comprising a valve block having spaced valve bores and a chamber communicating with the upperportions of said valve bores, and also having channels communicating with said valve bores, double seating 'valves working in said bores yfor controlling communication between the said channels, and having pistons atv one'end adjacent the said chamber, springs in bores engaging the valves atone end, said block having passages between its said chamber and the said channels also con-x trolled by the valves and opening at one the Y side of the said valve pistons, means for y Y supplying steam to the said chamber, each of said valves having an axial bore therethrough, and a pilot valve normally seated at one end of each of the valve bores.

, 3. A driftingfdevice of the character described,` comprising a valve block having a chamber, valve bores inV communication y with the chamber adjacent their upper ends and connecting passages between the valve bores, said block also having channels at thek sides of-.and communicating with said valve bores, double seating valves movable inA said bores andV having through, pilot valves controlling the said axial openings of the `main axial openings tliere-V f valve, said block c having ports between itssaid chamber and f one of kthe connecting passages, andimeans,

for supplying low pressure'steam tol said chamber.

4l. In a locomotive pass and relief valve having nels and a steam chamber,

by-pass chansaid channels and between the channels and said steam chamber, and having axial openings, pilot valves controlling the axial open! said openings of thev 5. A drifting block having a double seatingy Avalves controlling communication betweenv drifting device, a by means for supplying seats, said block i having a steam passage leading between the i valve seats, v in said bore, having valvev members coperatand a vvalve Vmovable vertically y ing with said seats andhaving a-lower skirt portion whose annular wall has upper apertures therethrough communicating with rsaid chamber and-whose lower portion slidf ably interiits the lower portion vof the valve bore below the chamber.

' L Y WHELAN; 

